Life is not on my side

My first job was a seasonal position last year so I had to leave. Then I worked in an office, but they let me go. Then I worked at a tshirt wharehouse but they couldn't afford me. Tuesday I got hired as a nanny, wednesday she told me she changed her mind. I want to give up. I want to juss drift away. Why is it so hard to be an adult in this world. What am I doing wrong? How do I fix it....